JP2004082437A - Apparatus for molding light guiding plate and method for molding light guiding plate - Google Patents

Apparatus for molding light guiding plate and method for molding light guiding plate Download PDF

Info

Publication number
JP2004082437A
JP2004082437A JP2002244750A JP2002244750A JP2004082437A JP 2004082437 A JP2004082437 A JP 2004082437A JP 2002244750 A JP2002244750 A JP 2002244750A JP 2002244750 A JP2002244750 A JP 2002244750A JP 2004082437 A JP2004082437 A JP 2004082437A
Authority
JP
Japan
Prior art keywords
light guide
guide plate
molding
forming
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2002244750A
Other languages
Japanese (ja)
Other versions
JP3751921B2 (en
Inventor
Ikuo Asai
浅井 郁夫
Original Assignee
Meiki Co Ltd
株式会社名機製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Meiki Co Ltd, 株式会社名機製作所 filed Critical Meiki Co Ltd
Priority to JP2002244750A priority Critical patent/JP3751921B2/en
Publication of JP2004082437A publication Critical patent/JP2004082437A/en
Application granted granted Critical
Publication of JP3751921B2 publication Critical patent/JP3751921B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To perform a finishing molding such as smoothing and pattern molding to a gate mark remaining on the side face of a light guiding plate to be molded molded by an injection molding machine, and to a cut face of the light guiding plate to be molded extruded and cut by an extrusion molding apparatus by a mechanism being simple and requiring no running cost. <P>SOLUTION: An apparatus for molding the light guiding plate comprises a holding means 8c being brought into contact with either one or both of the surface B2 and/or the back surface B3 of the light guiding plate B to be molded and holding the light guiding plate B to be molded, and a side face molding means 8a for molding at least one side face B1 of the light guiding plate B to be molded. The side face molding means 8a has a stamper 26 which is a pressing part directly coming into plane contact with the side face B1 of the light guiding plate B to be molded, a base plate part 24 which is a heating mechanism for heating the stamper 26 and is heated by resistance heating, and a pressing cylinder 15 which is a pressing mechanism pressing in the direction approximately at right angles to the side face B1 of the light guiding plate B to be molded, and performs the finishing molding on the side face B1 of the light guiding plate B to be molded. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a light guide plate forming apparatus and a light guide plate forming method in which a pressurizing portion is directly brought into contact with a side surface of a light guide plate to be molded which is primarily formed, and pressurizing and heating are performed to finish-mold the side surface of the light guide plate. It is about.
[0002]
[Prior art]
Conventionally, a light guide plate is formed by injection molding using an injection molding machine having a mold with a stamper attached thereto, or by sticking a prism sheet to a resin plate that has been extruded and cut using an extrusion molding apparatus. ing.
However, in the former injection molding method using an injection molding machine, it is necessary to raise the set temperature of the mold in order to improve the transfer by the stamper. As a result, the cooling of the molded product in the cavity is completed, and the molded product is cooled. There is a problem that it takes time to be able to take out. In addition, when the light guide plate is injection-molded by an injection molding machine, the gate position is generally provided on the side surface of the light guide plate to be molded. I needed to get rid of it. In addition, the method of attaching a prism sheet to a resin plate extruded by an extrusion molding apparatus has a problem that the prism sheet is expensive, and requires a separate device for attaching the prism sheet.
[0003]
In order to solve the above two problems, as described in JP-A-2001-133772 and JP-A-2001-300954, a press molding apparatus is used by using a primary molded resin plate. It is known that a light guide plate is obtained by performing subsequent molding.
However, the press molding apparatus described in Japanese Patent Application Laid-Open No. 2001-133772 presses the primary molded resin plate only from the front and back directions. Therefore, the press forming apparatus disclosed in the above publication cannot perform pressure from the side surface direction which becomes the light incident surface of the light guide plate, and furthermore, problems such as generation of burrs on the joint surface between the upper mold and the lower mold may occur. There was also nature. The press molding apparatus described in Japanese Patent Application Laid-Open No. 2001-300954 presses a hoop material, which is a primary molded light guide plate, from the front and back directions, and still connects the hoop material to the side surface of the molded product. There is a problem in that a portion remains and a cut mark remains when the connecting portion is cut in the cutting step.
[0004]
Further, in a molding method of processing a primary molded resin plate to obtain a light guide plate, as a method of processing a side surface of a primary molded light guide plate to be molded, a method described in JP-A-2001-296429 is used. It has been known.
The publication describes that a transfer pad such as a prism sheet is transferred by pressing a transfer pad against a side surface of a light guide plate to be molded which is primarily formed. However, in the above publication, an expensive prism sheet is attached, and it is necessary for an attendant to always check the remaining amount of the sheet and replenish the sheet. Further, the above publication is limited to the one in which a side reflection layer is provided on the side surface of the light guide plate, and is not intended to perform finish forming of a gate mark or smooth finish forming of a light incident surface.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above-mentioned problems, and has a gate mark remaining on a side surface of a light guide plate to be molded formed by an injection molding machine, a guide for molding formed and cut by an extrusion molding device. An object of the present invention is to enable finish forming such as smoothing and pattern forming to be performed on a cut surface of a light plate by a simple and low-cost mechanism.
[0006]
[Means for Solving the Problems]
The light guide plate forming apparatus according to claim 1, wherein the holding unit is configured to hold the light guide plate to be formed in contact with one or both of the front surface and the back surface of the light guide plate to be formed, and the light guide plate to be formed. Side molding means for molding at least one side surface of the light guide plate, as the side surface molding means, a pressurizing portion directly in contact with the side surface of the light guide plate to be molded, and the pressurizing portion It has a heating mechanism for heating, and a pressing mechanism for pressing the side surface of the light guide plate for molding in a direction substantially perpendicular to the side surface of the light guide plate for molding, and performs finish molding on the side surface of the light guide plate for molding. Features.
[0007]
According to a second aspect of the present invention, in the light guide plate forming apparatus according to the first aspect, a stamper capable of transferring a pattern or forming a smooth surface is attached to at least one side surface of the light guide plate to be molded as a pressing portion of the side surface forming means. The finish molding is performed on the side surface of the light guide plate to be molded by the stamper.
[0008]
According to a third aspect of the present invention, there is provided a light guide plate forming apparatus according to the first or second aspect, wherein the side surface forming means is a flat cooling plate whose temperature is controlled to a predetermined temperature, and an additional member provided in parallel with the cooling plate. A heating plate having a pressure portion, and a heating plate moving mechanism capable of bringing the heating plate into contact with and separating from the cooling plate during one molding cycle, while rapidly lowering the temperature of the heating plate. It is characterized in that the light guide plate for molding can be finished on the side surface.
[0009]
In the light guide plate forming apparatus according to the fourth aspect, in any one of the first to third aspects, the light guide plate forming apparatus is located at the same position as the holding means for holding the light guide plate to be molded or at a different position from the holding means. Surface or back surface forming means capable of forming a light guide plate to be formed is provided in contact with one or both of the front surface and the back surface of the light guide plate to be formed. A pressing portion formed by a stamper capable of forming a transferable or smooth surface, a pressing mechanism for pressing the pressing portion, and either one of the front surface and the back surface of the light guide plate for molding by the pressing portion or It has a pressure mechanism capable of pressing both at substantially right angles, and the stamper can also perform finish molding on the front and / or back surfaces of the light guide plate to be molded.
[0010]
The light guide plate forming apparatus according to claim 5, wherein the holding means holds the light guide plate to be formed in contact with the front and / or back surface of the light guide plate to be transferred, and the work held by the holding means. And a side surface pressing roller capable of directly pressing at least one side surface of the light guide plate, and the side surface pressure roller is provided in a direction substantially perpendicular to the longitudinal direction of the side surface of the light guide plate to be molded. A rotating roller provided around a rotating shaft and having a pressurized outer peripheral surface capable of contacting and pressing the one side surface of the light guide plate to be molded, and a heating mechanism capable of heating the pressurized outer peripheral surface of the rotary roller. Further, it is characterized in that finish molding can be performed on the side surface of the light guide plate to be molded by the rotating roller.
[0011]
According to a sixth aspect of the present invention, there is provided a method for forming a light guide plate, wherein the light guide plate forming apparatus according to the second aspect is used to hold one or both of the front surface and the rear surface of the light guide plate to be molded, and to form the light guide plate for molding. A stamper capable of transferring a pattern and forming a smooth surface can be brought into contact with at least one side surface of the light guide plate, and heated and pressed to form a side surface of the light guide plate to be molded.
[0012]
According to the light guide plate forming method of the present invention, a pattern or a smooth surface can be formed on one or both of the front surface and the back surface of the light guide plate to be molded by using the light guide plate forming device of the third embodiment. Heating and pressurizing at least one side surface of the light guide plate to be molded at the same time as before or after the start of the heating and pressurizing by the stamper. The light guide plate for molding is formed, and the light guide plate for molding can be formed substantially parallel to one or both of the side surface, the front surface, and the rear surface.
[0013]
In the light guide plate molding method according to the eighth aspect, a resin material is supplied to an extrusion molding apparatus having a continuously rotatable screw provided therein and having a die in front thereof, and a resin plate having the same cross section is continuously extruded from the die. The light guide plate according to any one of claims 1 to 4, wherein the light guide plate for molding is obtained by molding and cutting the resin plate to obtain a light guide plate for molding. It is characterized in that it can be finish-formed by an apparatus.
[0014]
In the light guide plate molding method according to the ninth aspect, a resin raw material is supplied to an injection device of an injection molding machine, plasticization measurement is performed, and the molten resin is supplied from the injection device into the cavity through a gate formed on one side surface of the cavity. Injection molding, cooling the molten resin in the cavity, separating the molten resin in the vicinity of the gate to obtain a light guide plate for molding, and forming a gate mark on one side of the light guide plate for molding. 4. The finish molding can be performed by the light guide plate molding apparatus according to any one of 4.
[0015]
According to a tenth aspect of the present invention, there is provided the light guide plate forming method according to any one of the sixth to ninth aspects, wherein the side surface of the light guide plate to be molded is a light entrance surface of the light guide plate, and the light entrance surface is provided. Is characterized in that the finish molding can be performed.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall view of a light guide plate forming apparatus of the present invention. FIG. 2 is a cross-sectional view of the front and back surface forming device of the light guide plate forming device of the present invention. FIG. 3 is a sectional view of a side molding device of the light guide plate molding device of the present invention. FIG. 4 is a partial sectional plan view of a side molding device of the light guide plate molding device of the present invention.
[0017]
An outline of a molding line of the light guide plate molding apparatus 1 according to the embodiment of the present invention will be described with reference to FIG. In the light guide plate forming apparatus 1 of this embodiment, a strip-shaped resin plate A extruded by the extrusion forming apparatus 3 is cut by a cutting device 5 to obtain a light guide plate B for molding which is primarily formed. Finish molding is performed on at least one side surface B1 of the molding light guide plate B. In the present invention, the light guide plate B to be molded refers to a primary molded resin plate for molding the light guide plate C. The side surface B1 of the light guide plate B to be molded refers to a rectangular surface of a small area having a longitudinal direction which is a light incident surface or the like of the light guide plate C, and the front surface (front surface) B2 is light emission of the light guide plate. It refers to a large-area rectangular surface serving as a surface, and the back surface refers to the opposite rectangular surface (see FIG. 2).
[0018]
In FIG. 1, the resin material supply device 2 located on the right side has a mechanism for drying the resin material and automatically supplying the resin material to the hopper 3 a of the extrusion molding device 3. The extrusion molding device 3 melts the resin raw material supplied from the resin raw material supply device 2 by a continuously rotatable screw (not shown) inside the barrel 3b, and forms a strip-shaped resin plate from a die 3c provided in front. A is extruded on the take-up device 4 as A. The take-off device 4 is movable in synchronization with the moving speed of the extruded strip-shaped resin plate A, and supplies the strip-shaped resin plate A to the cutting device 5.
[0019]
The cutting device 5 is provided to cut the strip-shaped resin plate A supplied by the take-off device 4 to obtain a light guide plate B for molding, and has a cutting blade 5a that is movable in the vertical direction and is heated. are doing. The cutting device 5 has a stopper plate 5b for cutting the strip-shaped resin plate A in accordance with a predetermined length of the light guide plate B to be molded. Further, the cutting device 5 has a synchronous driving device 5c so that the moving speed of the belt-shaped resin plate A to be sent and the cutting device 5 can be cut while moving in synchronization. The cutting device 5 may be one that cuts the band-shaped resin plate A with a cutting tool, a heated piano wire, a water jet, or the like. The plate A may be cut.
[0020]
The cut light guide plate B to be molded is conveyed below the transfer device 6 on the conveyor. The transfer device 6 carries the light guide plate B to be molded into the molding position 7b of the front and back molding device 7 by the loading-side transfer device 6a. Alternatively, the light guide plate B to be molded is carried out from the molding position 7b to the next side molding device 8 by the carry-out side transfer machine 6b of the transfer device 6. In this embodiment, the unloading-side transfer device 6b of the transfer device 6 is provided with a rotation mechanism that rotates the light guide plate B to be formed in the horizontal direction at 90 ° C.
[0021]
The front and back forming device 7 is provided with front and back forming means 7a, and is provided so as to be capable of being press-formed in a direction substantially perpendicular to the front surface B2 and the back surface B3 of the light guide plate B to be formed. In this embodiment, the front and back molding device 7 performs molding on both the front surface B2 and the back surface B3, but may perform molding on only one of the front surface B2 and the back surface B3. Further, in this embodiment, the front and back molding device 7 is provided separately from the holding means 8c of the side molding device 8 before the side molding device 8 described later, but is provided at the same position as the side molding device 8. May be used. In that case, the front and back molding device 7 also has a role of the holding means 8c of the side molding device 8. Further, the front and back molding device 7 may be provided in a subsequent step of the side molding device 8. Furthermore, in the present invention, the front and back molding device 7 is not an essential device. The configuration of the front and back molding device 7 will be described later in detail.
[0022]
The side surface forming device 8 is provided with side surface forming means 8a, which is provided so as to be pressurizable in a direction substantially perpendicular to the side surface B1 of the light guide plate B to be formed. In this embodiment, the side molding device 8 is provided with a molding position 8b of the light guide plate B for molding on a conveyor, and holds the light guide plate B for molding by holding means 8c. Pressure molding is performed by heating and cooling the side surface B1 of the light guide plate B to be molded by the provided side molding means 8a. The side forming device 8 will be described later in detail. In the post-process of the side molding device 8, an inspection device 9 including a CCD camera or the like is provided, and the light guide plate C, which is determined as a good product by the inspection device 9, is packed in a box by the loading device 10.
[0023]
In the molding line of the light guide plate molding apparatus 1 of this embodiment, the posture of the light guide plate B to be molded sent on the line is such that the front surface B2 and the back surface B3 are vertically oriented, and the side surface B1 is horizontally oriented. In this state, the molding is performed by the side molding device 8 or the like. However, each molding may be performed with the side surface B1 oriented vertically, and the light guide plate B for molding may be formed in the middle. May be changed. Although not provided in this embodiment, a preheating device for preheating the light guide plate B to be molded by infrared rays or the like may be provided in a process preceding the front and back molding device 7 and the side molding device 8. Good.
[0024]
Next, the front and back forming apparatus 7 of the present invention will be described in detail with reference to FIG. The front and back surface forming device 7 is a device for finish-forming one or both of the front surface B2, which is the light emitting surface of the light guide plate B to be molded, and the back surface B3, which is the back surface of the light emitting surface. In this embodiment, the front and back molding device 7 performs molding on both the front surface B2 and the back surface B3.
The front and back molding device 7 has a lower mold 12 disposed on a bed 11. Further, an upper panel 14 is arranged to face the bed 11 via a tie bar 13 erected on the bed 11. A pressing cylinder 15 as a pressing mechanism is fixed to the upper plate 14, and an upper die 17 is fixed to a ram 16 inserted in the pressing cylinder 15 so as to face the lower die 12. Therefore, the front and back molding device 7 can press the front surface B2 and the back surface B3 of the light guide plate B to be molded between the lower mold 12 and the upper mold 17 in a direction substantially perpendicular to the lower mold 12 and the upper mold 17 by driving the pressurizing cylinder 15. Is provided.
[0025]
Since the lower die 12 and the upper die 17 of the front and back molding device 7 have substantially the same structure, the lower die 12 will be described. The lower die 12 has a flat plate shape having a through hole 18 through which a cooling medium can flow. Is provided. A cooling medium whose temperature has been adjusted is supplied from a cooling medium supply means (not shown) to the through hole 18 of the cooling board 19, and the cooling board 19 is provided to be able to control the temperature to a predetermined temperature. On the surface of the cooling board 19, a cushion material 20 made of heat-resistant rubber is stuck. Further, the heating plate moving cylinders 21 and 21 as the heating plate moving mechanism are fixed to the cooling plate 19 in a direction in which the rods 22 and 22 are directed toward the upper mold 17, and the rods of the heating plate moving cylinders 21 and 21 are fixed. A substrate portion 24 of a heating plate 23 is fixed to the cooling plates 19 and 22 in parallel with the cooling plate 19. Therefore, in the lower die 12, when the rods 22, 22 of the heating plate moving cylinders 21, 21 are extended, the heating plate 23 and the cooling plate 19 are separated at a predetermined interval, and when the rods 22, 22 are retracted, the heating plate 23 is retracted. And the cooling board 19 are provided so as to be in contact with each other.
[0026]
The heating plate 23 includes a substrate portion 24, a cushion material 25 made of heat-resistant rubber on the surface side of the substrate portion 24 (the side opposite to the cooling board 19), and a light guide plate to be molded attached to the surface side of the cushion material 25. B includes a stamper 26 which is a pressurizing portion for the back surface B3. In this embodiment, the stamper 26 has a fine concavo-convex pattern on which a pattern can be transferred to the back surface B3 of the light guide plate B to be molded. However, the stamper 26 having a mirror surface so that a smooth surface can be formed. May be. Either of the above stampers 26 may be attached to the upper die 17. As a heating mechanism of the heating plate 23, in this embodiment, the substrate portion 24 is formed of a resistance heating plate, and electrodes 24a and 24b are attached to both sides of the substrate portion 24, and are provided via the electrodes 24a and 24b. The substrate unit 24 is configured to be heated by being energized to the substrate unit 24. The heating mechanism of the heating plate 23 may be such that the stamper 26 is a resistance heating plate or a rubber heater or a cartridge heater is separately provided. Accordingly, the heating plate 23 is rapidly heated by the resistance heating of the substrate portion 24 of the heating plate 23 when the heating plate 23 is separated from the cooling plate 19 during one molding cycle. The heating plate 23 is provided so as to be able to rapidly cool by stopping the power supply to the substrate portion 24 when the heating plate 23 is in contact with the cooling board 19.
[0027]
Next, the side forming device 8 will be described in more detail with reference to FIGS. In this embodiment, the side molding device 8 is provided on a transport path of a belt conveyor 31 that transports the light guide plate B to be molded. The belt conveyor 31 is a publicly known one, and has two conveyor belts between pulleys 32a, 32a disposed on a front side (pre-process side) and a rear side (post-process side), and pulleys 32b, 32b. 33, 33 are stretched in parallel. The light guide plate B for molding can be placed on the conveyor belts 33, 33, and the light guide plate B for molding placed on the conveyor belts 33, 33 can be intermittently moved by intermittent driving of the electric motor 34. It is provided in.
[0028]
The base plate 35 of the side molding device 8 is horizontally fixed by a frame 36 below the molding position 8b of the light guide plate B to be molded on the transportation path of the transportation belts 33, 33. A holding plate 38 to which a cushion material 37 made of a rubber plate is attached is mounted between the transport belts 33 on the base plate 35 so as to be able to move up and down by a cylinder 39 fixed to the base plate 35. . When the cylinder 39 is extended, the upper surface of the holding plate 38 becomes substantially the same height as the upper surfaces of the transport belts 33, 33, and is provided so as to be able to abut on the rear surface B3 of the light guide plate B for molding. I have. The holding plate 38 has two rows of suction holes 40 formed in parallel with the transport belts 33, 33. A flexible conduit 41a is connected to the suction hole 40 on the back side of the holding plate 38, and the plurality of flexible conduits 41a are integrated into one main conduit 41b and provided on one side. Connected to the vacuum device 55. In front of the holding plate 38 between the transport belts 33, 33, a stopper plate 42 for stopping the light guide plate B to be molded conveyed on the transport belts 33, 33 at a predetermined position is provided with a frame. It is provided so as to be able to move up and down by a cylinder 43 fixed to 36. The holding plate 38, the stopper plate 42, the vacuum device 55 and the like constitute a holding means 8c for holding the light guide plate B to be formed at the forming position 8b. Note that the holding means 8c may be constituted by only the holding plate 38 without the vacuum device 55. Further, the conveying belts 33, 33 may be holding means 8c, and the side surface forming means 8a may form the side surface B1 of the light guide plate B for molding while moving in synchronization with the conveying belts 33, 33.
[0029]
A side surface forming means 8a which can press at least one side surface B1 of the light guide plate B for molding is provided on both sides of the holding plate 38 in a direction substantially perpendicular to the conveying direction of the light guide plate B for molding. It is arranged. The side forming means 8a on one side will be described. On one side of the position where the holding plate 38 is provided on the base plate 35, pressing cylinders 44, 44 serving as a pressing mechanism are provided on the light guide plate B for forming. The rods 45, 45 are fixed so as to be able to advance and retreat toward the molding position 8b. A cooling board 46 is fixed to the rods 45 of the pressurizing cylinders 44. The side surface of the cooling plate 46 is guided by guide members 47, 47 provided on the base plate 35 in parallel with the advancing and retreating direction of the rod 45. The cooling plate 46 is moved in the conveying direction of the light guide plate B to be molded. It is provided so as to be movable in a substantially right angle direction. The front surface of the cooling board 46 is formed in a flat plate shape, and a through hole 48 through which a cooling medium can flow is formed therein. A cooling medium is supplied to a through hole 48 of the cooling board 46 from a cooling medium supply device (not shown), and the cooling board 46 is provided so as to be controlled at a predetermined temperature.
[0030]
Further, as shown in FIG. 4, on both ends of the cooling board 46, heating plate moving cylinders 49, 49 serving as a heating plate moving mechanism can move rods 50, 50 in the same direction as the pressing cylinders 44, 44. Fixed. A substrate portion 52 of a heating plate 51 is fixed to the rods 50, 50 of the heating plate moving cylinders 49, 49 in parallel with the cooling plate 46. Therefore, when the rod 50 of the heating plate moving cylinder 49 is extended, the heating plate 51 and the cooling plate 46 are separated at a predetermined interval, and when the rod 50 is retracted, the heating plate 51 and the cooling plate 46 are provided to be in contact with each other. Has been. The stroke of the heating plate moving cylinder 49 is shorter than the stroke of the pressurizing cylinder 44 by a predetermined amount.
[0031]
In addition, the heating plate 51 has a pressing portion that can directly contact the side surface B1 of the light guide plate B for molding. In this embodiment, the pressing portion is formed of a stamper 53 capable of transferring a pattern to the side surface B1 of the light guide plate B to be molded, and the stamper 53 is connected to the substrate portion 52 via a cushion member 54 made of a rubber plate. Mounted on. However, the stamper 53 forming the pressurizing portion is not for forming a pattern as in this embodiment, but is formed from a mirror surface for forming a light incident surface of the side surface B1 of the light guide plate B for molding smoothly. Stamper 53 may be used. Further, the heating plate 51 may be configured such that the front surface of the substrate portion 52 serves as a pressing portion without attaching the stamper 53.
[0032]
In this embodiment, the heating means of the heating plate 51 has a configuration in which the substrate 52 is formed of a resistance heating plate, and the electrodes are attached to both sides of the substrate 52, as in the case of the front and back molding device 7 described above. It is configured to be heated by heating. As a heating means of the heating plate 51, the stamper 53 may be a resistance heating plate, or a rubber heater or a cartridge heater may be separately provided. Therefore, the heating plate 51 is provided so as to be able to contact and separate from the cooling board 46 during one molding cycle by the above-described configuration. The heating plate 51 is separated from the cooling board 46, and is rapidly heated by resistance heating of the substrate portion 52 of the heating plate 51. Further, the heating plate 51 is provided so as to be able to rapidly cool by stopping power supply to the substrate portion 52 and being brought into contact with the cooling plate 46. Further, the side forming means 8a on the other side of the side forming device 8 is arranged symmetrically with respect to the center line of the side forming means 8a on one side and the belt conveyor 31. When the cylinder 49 for moving the heating plate on one side and the other side is driven forward, the side surface forming means 8a substantially simultaneously applies the heating plate 51 to the side surface B1, B1 on one side and the other side of the light guide plate B for molding. , 51 are provided so as to be in contact with stampers 53, 53 which are pressurizing portions.
[0033]
A vacuum chamber may be formed for the side molding device 8 or the front and back molding device 7, and the molding may be performed in the vacuum chamber. Further, the cylinder used in the side molding device 8 or the front and back molding device 7 may be a hydraulic cylinder or an air cylinder, and the cooling plate and the heating plate may be moved by an electric motor instead of the cylinder.
[0034]
Next, a light guide plate forming method using the light guide plate forming apparatus 1 will be described. The resin used for molding the light guide plate C in this embodiment is acrylic, but other polycarbonates, cycloolefin polymers, and the like are used in the present invention. The strip-shaped resin plate A extruded from the die 3c of the extrusion molding device 3 into a shape substantially matching the cross-sectional shape of the light guide plate C is cut by the cutting device 5 into a length substantially matching the length of the light guide plate C. The light guide plate B to be molded cut by the cutting device 5 and conveyed on the conveyor is sucked by the carry-in transfer machine 6a of the transfer device 6 and carried into the molding position 7b of the front and back molding device 7. At this time, the heating plates 23 of the lower mold 12 and the upper mold 17 of the front and back molding device 7 and the stampers 26 attached to the heating plates 23 are such that the rods 22, 22 of the heating plate moving cylinders 21, 21 are extended. The substrate portion 24 is heated to 160 ° C. by resistance heating.
[0035]
When the light guide plate B for molding is carried into the molding position 7b and the back surface B3 of the light guide plate B for molding is placed on the stamper 26 of the lower mold 12, the heating plate moving cylinder of the lower mold 12 and the upper mold 17 is moved. The heating plate 23 and the cooling plate 19 are brought into contact with each other. At the same time, the heating of the heating plate 23 is started by stopping the power supply to the substrate 24. At about the same time, the ram of the pressurizing cylinder 15 is lowered, and the surface (front surface) B2 of the light guide plate B to be formed and the stamper 26 of the upper die 17 are directly brought into surface contact. Then, the light guide plate B to be molded is pressed at 3 MPa for 120 seconds between the stamper 26 of the lower mold 12 and the stamper 26 of the upper mold 17. During the pressing, the temperature of the stamper 26 of the heating plate 23 is reduced from 160 ° C. to 50 ° C. by the contact between the cooling plate 19 and the heating plate 23. Therefore, the surface layer portion of the light guide plate B to be molded has a temperature higher than 90 ° C. to 100 ° C. which is the heat deformation temperature (ASTM D638 (1.82 MPa)) of the acrylic resin at the beginning of molding. The deformation proceeds, and the temperature of the heating plate 23 falls below the thermal deformation temperature at the end of the molding, so that the molding is completed in a state where the shape is stable.
[0036]
In the light guide plate molding method of the present invention, the pressure applied to the light guide plate B to be molded is preferably in the range of about 0.5 MPa to 5 MPa, and the pressurization time is preferably in the range of about 60 seconds to 150 seconds. . The temperature of the heating plate 23 is desirably 120 ° C. to 160 ° C. at the beginning of molding. This is a temperature 10 ° C. to 70 ° C. higher than the heat distortion temperature (ASTM D638 (1.82 MPa)) of the resin to be molded. Therefore, for example, when the resin used is polycarbonate, its heat distortion temperature (ASTM D638 (1.82 MPa)) is about 135 ° C., and in this case, the temperature of the stamper at the beginning of molding is about 145 ° C. to 205 ° C. Appropriate temperature. In the case of a stamper capable of forming a smooth surface, molding can be performed at a molding start temperature 20 ° C. to 40 ° C. lower than the above temperature.
[0037]
Another molding method using the front and back molding device 7 is as follows. After the light guide plate B to be molded is placed on the stamper 26 of the heating plate 23 of the lower die 12, the heating plate moving cylinder 21 is immediately moved. Only the pressurizing cylinder 15 is lowered to a predetermined position without retracting, and the stamper 26 and the front surface B2 and the rear surface B3 of the light guide plate B for molding are pressed for a predetermined time while the cooling plate 19 and the heating plate 23 are separated. You may make it contact. After a lapse of a predetermined time, the heating plate moving cylinder 21 is retracted, the heating plate 23 is brought into contact with the cooling plate 19, the power supply to the substrate section 24 is stopped, and the temperature of the Pressurization is performed by 26.
When the transfer molding to the molding light guide plate B is completed by any of the above methods, the front and back molding device 7 raises the ram 16 of the pressing cylinder 15 and raises the upper die 17, and the stamper of the upper die 17 26 and the surface B2 of the light guide plate B to be formed are separated from each other. Then, the light guide plate B to be molded, which has been transfer-molded to the front surface B2 and the back surface B3, is unloaded from the molding position 7b by the unloading side transfer machine 6b of the transfer device 6, and transferred to the side surface forming device 8. Is done. At this time, the direction of the light guide plate B to be formed is rotated by 90 ° in the horizontal direction, and the side surface B1 of the light guide plate B to be cut by the cutting device 5 is oriented in a direction perpendicular to the transport direction. Changes are made.
[0038]
The light guide plate B to be molded whose posture has been changed is placed on the transport belts 33 of the belt conveyor 31 of the side surface molding device 8 and carried on the holding plate 38 at the molding position 8b. When the light guide plate B for molding is moved by the conveyor belts 33, 33, the stopper plate 42 of the side molding device 8 is in the raised position, and the front end of the light guide plate B for conveyance that has been conveyed becomes the stopper plate 42. It abuts and stops at the molding position 8b. When it is detected by a detection device such as a photoelectric tube (not shown) that the light guide plate B for molding is completely carried into the molding position 8b and stopped, the cylinder 39 is extended, and the upper surface of the holding plate 38 is moved to the position of the light guide plate B for molding. The suction device is brought into contact with the back surface B3 and suction is performed by the vacuum device 55. Thus, the light guide plate B to be molded is held by the holding means 8c of the side surface forming device 8.
The side forming means 8a of the side forming device 8 is configured such that the rods 50, 50 of the heating plate moving cylinders 49, 49 extend to extend the heating plate 51 and the cooling plate until the light guide plate B to be formed is carried into the forming position 8b. When the stamper 53 is heated, the substrate portion 52 of the heating plate 51 is energized, and the stamper 53 is on standby. When the light guide plate B for molding is completely loaded into the molding position 8b, the rods 45, 45 of the pressure cylinders 44, 44 are extended, and the heating plates 51, 51 are moved with respect to the side surfaces B1 of the light guide plate B for molding. The stampers 53 are directly brought into surface contact with each other. At this time, the heating plate moving cylinders 49 and 49 are retracted almost at the same time, the substrate portion 52 of the heating plate 51 is brought into contact with the cooling board 46, the power supply to the substrate portion 52 is stopped, and the cooling of the heating plate 51 is started. You. The molding conditions of the side molding means 8a of the side molding device 8 at this time are the same as those of the front and back molding means 7a of the front and back molding device 7 described above.
[0039]
As described above, the transfer molding is favorably performed on the side surfaces B1 and B1 of the light guide plate B to be molded. When the transfer molding is completed, the side forming device 8 separates the stampers 53, 53 of the heating plates 51, 51 from the side surfaces B1, B1 with the retraction of the rod 45 of the pressing cylinder 44.
Then, the side forming device 8 releases the vacuum device 55 which is the holding means 8c, lowers the holding plate 38 and the stopper plate 42, drives the transport belts 33, 33 of the belt conveyor 31, and moves the side surface B1, The light guide plate C in which the finish molding of the front surface B2 and the back surface B3 is completed is sent. Thereafter, the light guide plate C is inspected by the inspection device 9, and the non-defective product is packed in a container by the loading device 10.
[0040]
In the present invention, the light guide plate forming apparatus 1 has a purpose of pressing at least one side surface B1 of the light guide plate B for molding while holding the light guide plate B for molding, and is another variation. Is also good. For example, although not shown, a resin material is supplied to an injection device of an injection molding machine, plasticization is measured, and molten resin is injected and filled into the cavity from the injection device through a gate formed on one side surface of the cavity. Alternatively, the molten resin may be cooled in the cavity and separated near the gate portion to obtain the light guide plate B to be molded, and then subjected to finish molding in the side molding device 8. In this case, since a gate mark remains on one side surface B1 of the light guide plate B to be molded formed by the injection molding machine, the gate mark can be reduced by using a smooth pressing part of the side molding device 8. Can be eliminated. Therefore, for example, in the case of injection molding of a wedge-shaped light guide plate, it is currently avoided to provide a gate on the light-incident surface on the thick side, which makes it possible to satisfactorily inject and fill the molten resin into the cavity. Even if a gate is provided on the light incident surface, it is possible to easily process the gate mark.
[0041]
Further, the light guide plate forming apparatus 1 does not form the above-described forming line, but carries the light guide plate B to be molded manufactured in another place into the side molding apparatus 8 according to the present invention, and guides the light guide plate to be molded. Only the side surface finishing of the light plate B may be performed. Further, when performing only the side surface finishing of the light guide plate B to be molded, a plurality of light guide plates B to be molded are stacked, and the finish molding of the side surfaces B1 of the plurality of light guide plates B to be molded is performed at the same time. It may be. When the wedge-shaped light guide plates B to be molded are overlapped, the thick portions and the thin portions may be alternately overlapped. Further, the light guide plate B to be molded according to the present invention is assumed to be relatively thick and large in terms of shortening the time required for finishing the side surface by polishing. The present invention is not limited to the above, and may be small and thin. In this case, the finishing of the side surface B1 and the finishing of the front surface B2 and the back surface B3 are performed simultaneously by arranging a plurality of light guide plates B for molding in the horizontal direction. May be. Furthermore, the light guide plate B to be molded formed according to the present invention has a surface B1 on which irregularities such as a claw portion are formed. The finish molding may be performed by the device 8.
[0042]
Next, a second embodiment will be described with reference to FIG.
The light guide plate forming device 61 of the second embodiment is an example in which the front and back surface forming device 7 and the side surface forming device 8 of the light guide plate B to be formed are incorporated in one device so that they can be formed at the same position. The lower die 63 is disposed on the bed 62, and the upper die 64 is disposed opposite the lower die 63. The light guide plate forming apparatus 1 of the embodiment shown in FIGS. Is the same as In the light guide plate forming apparatus 61 of the second embodiment, a rubber heater 67 is attached via a cushion member 66 made of a rubber plate on a cooling board 65 provided in a lower mold 63. Is attached to the stamper 68. The upper die 64 is also provided with the same configuration. A ram 71 inserted into the pressurizing cylinder 70 is fixed to the upper die 64. The lower and upper dies 63, the upper dies 64, the pressurizing cylinder 70, and the like constitute a front and back molding means 69. The front and back forming means 69 press-forms the stamping member 68 on one or both of the front surface B2 and the back surface B3 of the light guide plate B to be formed by lowering the ram 71 inserted in the pressing cylinder 70. It can be carried out. The stamper 68 of the front and back molding means 69 is provided so as to be cooled by stopping the power supply to the rubber heater 67 during the pressure molding.
[0043]
A pressurizing cylinder 73 is arranged on the side of the lower die 63 on the bed 62. Cooling boards 75, 75 are fixed to the rod 74 of the pressurizing cylinder 73. The cooling boards 75, 75 are provided so as to be able to advance and retreat in a direction substantially perpendicular to the side surface B1 of the light guide plate B to be molded while being guided by guide members 76, 76 fixed to the bed 62. As with the cooling plate 65 of the lower mold 63, rubber heaters 78, 78 are attached to the cooling plates 75, 75 through cushion members 77, 77 made of rubber plates, and stampers 79 are provided on the upper surfaces of the rubber heaters 78, 78. , 79 are affixed. The pressurizing cylinders 73, 73, cooling boards 75, 75, stampers 79, 79, and the like constitute a side forming means 72. Then, the side surface forming means 72 can drive the pressing cylinders 73 and 73 to perform pressure forming on the side surface B1 of the light guide plate B to be formed by the stampers 79 and 79. The stamper 79 of the side molding means 72 is provided so as to be cooled by stopping the power supply to the rubber heater 78 during the pressure molding.
Accordingly, the light guide plate forming apparatus 61 having the above-described configuration allows the front and back surface forming means 69 to form the light guide plate B for molding into the front surface B2 and the back surface B3, and the side surface forming means 72 to form the light guide plate B onto the side surface B1. Can be performed almost simultaneously.
[0044]
In the light guide plate forming apparatus 61 of the second embodiment, as in the light guide plate forming apparatus 1 of the embodiment shown in FIGS. 1 to 4, the heating plate and the cooling plate are separately disposed so as to be separated from each other. It is also possible to set up. In this case, one of the molding devices is pressed against the light guide plate B for molding (the heating plate and the cooling plate are in contact with each other, and the pressure is applied to the light guide plate B by a pressure cylinder serving as a pressing means. After the pressure is reached), better molding is performed when the other heating plate is brought into contact with the surface of the light guide plate B to be molded. The second embodiment is different from the first embodiment in that the stamper 68 constituting the pressurizing unit can be attached to either a stamper capable of transferring a pattern or a stamper capable of forming a smooth surface. And the type of heating means are the same as in the light guide plate forming apparatus 1 of the embodiment shown in FIGS. Further, in the light guide plate forming apparatus 61 of the second embodiment, only the heating means may be provided without providing the cooling means. In this case, it is desirable that the temperature of the pressurized portion is about 10 ° C. to 20 ° C. higher than the thermal deformation temperature (ASTM D638 (1.82 MPa)) of the resin to be molded.
[0045]
Next, a third embodiment will be described with reference to FIG. The light guide plate forming apparatus 81 according to the third embodiment presses a side surface B1 of a light guide plate B to be formed by a rotating roller 82 as a side surface pressing roller to perform finish forming. In the case of the third embodiment, pressure is applied to the side surface B1 and the like by the rotating roller 82 while the light guide plate B for molding is being moved. Accordingly, the light guide plate B to be molded may be molded in a state of the band-shaped resin plate A extruded from the extrusion molding device 3. In the following description, an example in which the band-shaped resin plate A is molded will be described. I do.
[0046]
A light guide plate forming device 81 according to the third embodiment is provided on a path through which the band-shaped resin plate A is extruded with its side surface A1 up and down. In the light guide plate forming apparatus 81, a frame 83 is formed so as to surround a transport path of the band-shaped resin plate A, and holding frames 85a, 85a of holding rollers 84 are directed inward from the left and right frames 83a, 83b. 85b are formed in the horizontal direction, respectively. A support shaft 86 of a holding roller 84 is rotatably supported between the frames 85a and 85b, and the holding roller 84 is fixed to the support shaft 86. The outer peripheral surface 87 of the holding roller 84 is made of rubber, and is brought into contact with the front surface A2 and the back surface A3 of the band-shaped resin plate A by the elastic force of the rubber to hold the band-shaped resin plate A. When the cut light guide plate B to be molded is molded by the light guide plate molding device 81 of the third embodiment, an electric motor that rotationally drives the holding roller 84 to move the light guide plate B for molding is provided. It is desirable to provide.
[0047]
On the upper frame 83c and the lower frame 83d of the frame 83, a mounting portion 88 of a rotating roller 82 as a side surface pressing roller for pressing the side surface A1 of the belt-shaped resin plate A is provided with a spring 89 as an elastic body. Mounted through. The mounting portion 88 has a U-shaped cross section, and supports the rotating roller 82 in a direction substantially perpendicular to the moving direction of the side surface A1 of the strip-shaped resin plate A extruded from the extrusion molding device 3. A shaft 90 is rotatably supported. A rotary roller 82 is fixed to the support shaft 90, and the outer periphery of the rotary roller 82 contacts the side surface A 1 of the band-shaped resin plate A, and the side surface A 1 of the band-shaped resin plate A is applied by the action of the spring 89. The pressurized outer peripheral surface 91 is pressurizable. The pressing outer peripheral surface 91 of the rotating roller 82 is provided so as to be heated by a heating mechanism such as a heater (not shown). Note that the support shaft 90 may not be rotatable with respect to the mounting portion 88, and the rotation roller 82 may be provided so as to be rotatable with respect to the support shaft 90.
[0048]
In this embodiment, the pressing outer peripheral surface 91 of the rotating roller 82 has a flat shape in order to smooth the side surface A1 of the belt-shaped resin plate A. However, the pressurized outer peripheral surface 91 may be formed by forming irregularities on the side surface A1 of the strip-shaped resin plate A in order to form a groove. As for the rotating roller 82, a plurality of pairs of rotating rollers 82 may be provided in the transport direction. In this case, the rotary roller 82 disposed in the front in the transport direction has a flat outer peripheral surface 91 for improving heat conduction, and the rotary roller 82 disposed in the rear in the transport direction has irregularities. It may be. Further, the heating temperature of the rotating roller 82 disposed in the front in the conveying direction is increased, and the heating temperature of the rotating roller 82 disposed in the rear in the conveying direction is relatively lower than the heating temperature of the front rotating roller 82, The belt-shaped resin plate A may be cooled. In the light guide plate forming apparatus 81 according to the third embodiment, the belt-like resin plate A and the light guide plate B for molding may have a posture in which the side surface A1 is provided in the horizontal direction.
[0049]
【The invention's effect】
The light guide plate forming apparatus according to the present invention includes: holding means for holding the light guide plate to be formed in contact with one or both of the front and back surfaces of the light guide plate to be formed; and at least one of the light guide plates to be formed. And a side-surface forming means for forming the side surface. The side-surface forming means includes a pressurizing portion directly in contact with the side surface of the light guide plate to be molded, and a heating device for heating the pressurizing portion. Mechanism and a pressurizing mechanism that presses the side surface of the light guide plate for molding in a direction substantially perpendicular to the side surface of the light guide plate for molding. It can be pressed and formed by contact. Therefore, unlike the conventional apparatus, it is not necessary to purchase a prism sheet and set it in a separately provided bonding apparatus each time, and finish molding such as pattern molding can be easily and inexpensively formed on the side surface of the light guide plate to be molded. .
[0050]
In particular, in the case of a light guide plate having a large thickness and a large side surface area, polishing and shaping is conventionally performed by mechanical means, so that it takes time, and there is a problem in the workplace environment due to dust and the like. Finish molding can be performed accurately and easily without generating dust and the like. Furthermore, gate marks remaining on the side surface of the light guide plate to be molded formed by the injection molding machine can be easily eliminated, so that a gate can be provided on the light incident surface of the light guide plate to be molded. It became.
[0051]
[Brief description of the drawings]
FIG. 1 is an overall view of a light guide plate forming apparatus of the present invention.
FIG. 2 is a cross-sectional view of the front and back surface forming device of the light guide plate forming device of the present invention.
FIG. 3 is a sectional view of a side molding device of the light guide plate molding device of the present invention.
FIG. 4 is a partial sectional plan view of a side molding device of the light guide plate molding device of the present invention.
FIG. 5 is a sectional view of a light guide plate forming apparatus according to a second embodiment of the present invention.
FIG. 6 is a sectional view of a light guide plate forming apparatus according to a third embodiment of the present invention.
[Explanation of symbols]
1 Light guide plate forming device
2 ...... Resin raw material supply device
3 Extruder
3a ...... Hopper
3b ... barrel
3c ...... dice
4 ...... Taking-off device
5 ……… Cutting device
5a Cutting blade
5b, 42 ... Stopper plate
5c Synchronous drive device
6 ...... Transfer device
6a ...... Loading side transfer machine
6b …… Transportation side transfer machine
7 Front and back molding equipment
7a ... front and back molding means
7b, 8b ... molding position
8 …… side molding device
8a, 72 ... Side molding means
8c holding means
9 Inspection device
10 Loading device
11,62 ...... Bed
12,63 …… Lower mold
13 ...... Tie bar
14 ...... Upper stage
15, 44, 70, 73 ... Pressurizing cylinder
16,71… Ram
17, 64 ...... Upper mold
18,48… Through hole
19, 46, 65, 75 ... Cooling board
20, 25, 37, 54, 66, 77 Cushion material
21, 49 ...... Cylinder for moving heating plate
22, 45, 50, 74 ... rod
23, 51 ...... Heating plate
24, 52 ... board part
26, 53, 68, 79 ... Stamper
31 ...... Belt conveyor
32a, 32b ... pulley
33 …… Conveyor belt
34 …… Electric motor
35 ...... Base plate
36,83 …… Frame
38 ...... Holding plate
39, 43 ... Cylinder
40 ...... Suction hole
41a, 41b ... Pipe line
47, 76 ...... Guide member
55 Vacuum device
61, 81 ...... Light guide plate forming device
67, 78 ... Rubber heater
82 ...... Rotary roller
84 ...... Holding roller
85a, 85b ... Holding frame
86, 90… spindle
87 ...... Outer peripheral surface
88 ...... Mounting part
89 …… Spring
91 ...... Pressing outer peripheral surface
A: Band-shaped resin plate
A1, B1 ... side view
A2, B2 ... surface (front side)
A3, B3 ... back side
B ……… Light guide plate for molding
C ...... Light guide plate

Claims (10)

  1. Holding means for holding the light guide plate for molding in contact with one or both of the front surface and the back surface of the light guide plate for molding,
    Side surface forming means capable of forming at least one side surface of the light guide plate to be formed held by the holding means,
    The side forming means,
    A pressurizing portion capable of directly abutting against the one side surface of the light guide plate for molding,
    A heating mechanism capable of heating the pressurizing unit,
    A light guide plate forming apparatus, comprising: a pressing mechanism capable of pressing the light guide plate to be molded in a direction substantially perpendicular to the one side surface of the light guide plate.
  2. The pressurizing section of the side forming means,
    The light guide plate forming apparatus according to claim 1, wherein the light guide plate is formed by a stamper capable of transferring a pattern or forming a smooth surface on the one side surface of the light guide plate to be formed.
  3. The side forming means,
    A plate-shaped cooling plate that is temperature-controlled to a predetermined temperature;
    A heating plate provided in parallel with the cooling plate and having a pressing portion,
    3. The light guide plate forming apparatus according to claim 1, further comprising: a heating plate moving mechanism capable of contacting and separating the heating plate from the cooling plate during one molding cycle.
  4. As holding means for holding the light guide plate for molding, or separately from the holding means,
    Front and back surface forming means capable of forming the light guide plate for molding by contacting one or both of the front surface and the rear surface of the light guide plate for molding is provided,
    The front and back molding means,
    A pressing unit formed by a stamper capable of forming a smooth surface or a pattern transferable to one or both of the front surface and the back surface of the light guide plate for molding,
    A heating mechanism capable of heating the pressurizing unit,
    4. A pressure mechanism capable of pressing the light guide plate for molding in a direction substantially perpendicular to one or both of the front surface and the rear surface of the light guide plate for molding. The light guide plate molding apparatus according to any one of the above items.
  5. Holding means for holding the light guide plate for molding by contacting one or both of the front and back surfaces of the light guide plate for molding to be conveyed,
    A side surface pressing roller capable of directly pressing at least one side surface of the light guide plate to be molded held by the holding means,
    The side pressure roller is
    A support shaft provided in a direction substantially perpendicular to the longitudinal direction of the side surface of the light guide plate for molding, and abutment and pressurization on the one side surface of the light guide plate for molding provided around the support shaft A rotating roller having a pressurized outer peripheral surface,
    A light guide plate forming device, comprising a heating mechanism capable of heating a pressurized outer peripheral surface of the rotating roller.
  6. Using the light guide plate forming apparatus of claim 2,
    While holding either or both of the front and back surfaces of the light guide plate for molding,
    Heating and pressing a stamper capable of forming a smooth surface or transferring a pattern to at least one side surface of the light guide plate for molding,
    A method for forming a light guide plate, comprising forming the light guide plate for molding.
  7. Using the light guide plate forming apparatus of claim 3,
    Heating and pressing at the same time as applying a stamper capable of transferring a pattern or forming a smooth surface to one or both of the front surface and the back surface of the light guide plate for molding, and simultaneously heating or pressing by the stamper Heat or pressurize at least one side of the light guide plate for molding before or after the start,
    A method for forming a light guide plate, comprising forming the light guide plate for molding.
  8. A continuously rotatable screw is provided inside and a resin material is supplied to an extrusion molding apparatus having a die in front, and a resin plate having the same cross section is continuously extruded from the die,
    Cutting the resin plate to obtain a light guide plate for molding,
    A method of forming a light guide plate, wherein at least one cut surface of the light guide plate to be formed is finish-formed by the light guide plate forming apparatus according to any one of claims 1 to 4.
  9. Supply the resin material to the injection device of the injection molding machine, measure plasticization,
    Injecting and filling molten resin into the cavity from the injection device through a gate formed on one side of the cavity,
    Cooling the molten resin in the cavity, separating near the gate portion to obtain a light guide plate for molding,
    A light guide plate forming method, wherein a gate mark on one side surface of the light guide plate to be formed is finish-formed by the light guide plate forming apparatus according to any one of claims 1 to 4.
  10. The light guide plate forming method according to any one of claims 6 to 9, wherein the one side surface of the light guide plate to be formed is a light incident surface of the light guide plate.
JP2002244750A 2002-08-26 2002-08-26 Light guide plate forming apparatus and light guide plate forming method Expired - Fee Related JP3751921B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002244750A JP3751921B2 (en) 2002-08-26 2002-08-26 Light guide plate forming apparatus and light guide plate forming method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002244750A JP3751921B2 (en) 2002-08-26 2002-08-26 Light guide plate forming apparatus and light guide plate forming method

Publications (2)

Publication Number Publication Date
JP2004082437A true JP2004082437A (en) 2004-03-18
JP3751921B2 JP3751921B2 (en) 2006-03-08

Family

ID=32053137

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002244750A Expired - Fee Related JP3751921B2 (en) 2002-08-26 2002-08-26 Light guide plate forming apparatus and light guide plate forming method

Country Status (1)

Country Link
JP (1) JP3751921B2 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100747855B1 (en) 2005-04-28 2007-08-08 도시바 기카이 가부시키가이샤 Transfer apparatus having gimbal mechanism and transfer method using the transfer apparatus
JP2008132715A (en) * 2006-11-29 2008-06-12 Kata System:Kk Forming apparatus and forming method
JP2010089317A (en) * 2008-10-06 2010-04-22 Komatsu Sanki Kk Mold apparatus, thermal transfer pressing apparatus, and method for manufacturing thermal transfer molded article
WO2010075048A2 (en) 2008-12-16 2010-07-01 Microsoft Corporation Fabrication of optically smooth light guide
JP2011088348A (en) * 2009-10-22 2011-05-06 Shigeo Matsumaru Resin sheet molding, method of manufacturing the same, and hot pressing mold
WO2011112032A2 (en) * 2010-03-12 2011-09-15 Park Chul Method for manufacturing a light guide plate, and light guide plate
KR101130169B1 (en) 2010-03-12 2012-03-28 박철 Methode of manufacturing light guide plate and the light guide plate
WO2014148220A1 (en) * 2013-03-21 2014-09-25 シャープ株式会社 Method for manufacturing light guide plate, method for manufacturing illumination device, and method for manufacturing display device
WO2015023166A1 (en) * 2013-08-16 2015-02-19 (주)뉴옵틱스 Serration pattern forming apparatus and serration pattern forming method
KR101517291B1 (en) * 2013-08-16 2015-05-04 (주)뉴옵틱스 Apparatus and method for forming pattern
CN104669333A (en) * 2013-11-26 2015-06-03 高一智股份公司 Apparatus for processing surface of light-guide and precessing method thereof
KR101787079B1 (en) * 2010-11-04 2017-10-19 미래나노텍(주) Pattern forming apparatus and method
CN107315220A (en) * 2017-07-12 2017-11-03 东莞合安机电有限公司 A kind of bubble light guide plate manufactures complete machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI402153B (en) * 2009-02-17 2013-07-21

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100747855B1 (en) 2005-04-28 2007-08-08 도시바 기카이 가부시키가이샤 Transfer apparatus having gimbal mechanism and transfer method using the transfer apparatus
JP2008132715A (en) * 2006-11-29 2008-06-12 Kata System:Kk Forming apparatus and forming method
JP2010089317A (en) * 2008-10-06 2010-04-22 Komatsu Sanki Kk Mold apparatus, thermal transfer pressing apparatus, and method for manufacturing thermal transfer molded article
WO2010075048A2 (en) 2008-12-16 2010-07-01 Microsoft Corporation Fabrication of optically smooth light guide
KR101680395B1 (en) 2008-12-16 2016-11-28 마이크로소프트 테크놀로지 라이센싱, 엘엘씨 Fabrication of optically smooth light guide
EP2359171A2 (en) * 2008-12-16 2011-08-24 Microsoft Corporation Fabrication of optically smooth light guide
JP2012512075A (en) * 2008-12-16 2012-05-31 マイクロソフト コーポレーション Production of optical smooth light guide
EP2359171A4 (en) * 2008-12-16 2014-10-22 Microsoft Corp Fabrication of optically smooth light guide
JP2011088348A (en) * 2009-10-22 2011-05-06 Shigeo Matsumaru Resin sheet molding, method of manufacturing the same, and hot pressing mold
KR101812087B1 (en) 2009-10-22 2017-12-27 토코 쥬시 가부시키가이샤 Resin sheet molded article, method of manufacturing the same, thermal press molding die
WO2011112032A3 (en) * 2010-03-12 2012-02-23 Park Chul Method for manufacturing a light guide plate, and light guide plate
WO2011112032A2 (en) * 2010-03-12 2011-09-15 Park Chul Method for manufacturing a light guide plate, and light guide plate
KR101130169B1 (en) 2010-03-12 2012-03-28 박철 Methode of manufacturing light guide plate and the light guide plate
KR101787079B1 (en) * 2010-11-04 2017-10-19 미래나노텍(주) Pattern forming apparatus and method
WO2014148220A1 (en) * 2013-03-21 2014-09-25 シャープ株式会社 Method for manufacturing light guide plate, method for manufacturing illumination device, and method for manufacturing display device
US9939575B2 (en) 2013-03-21 2018-04-10 Sharp Kabushiki Kaisha Method of manufacturing light guide plate, lighting device, and display device
CN105190155A (en) * 2013-03-21 2015-12-23 夏普株式会社 Method for manufacturing light guide plate, method for manufacturing illumination device, and method for manufacturing display device
US9770875B2 (en) 2013-08-16 2017-09-26 New Optics, Ltd. Apparatus and method for forming serration pattern
KR101517291B1 (en) * 2013-08-16 2015-05-04 (주)뉴옵틱스 Apparatus and method for forming pattern
WO2015023166A1 (en) * 2013-08-16 2015-02-19 (주)뉴옵틱스 Serration pattern forming apparatus and serration pattern forming method
CN104669333A (en) * 2013-11-26 2015-06-03 高一智股份公司 Apparatus for processing surface of light-guide and precessing method thereof
CN107315220A (en) * 2017-07-12 2017-11-03 东莞合安机电有限公司 A kind of bubble light guide plate manufactures complete machine
WO2019010943A1 (en) * 2017-07-12 2019-01-17 梁晓东 Bubble light guide plate manufacturing machine set

Also Published As

Publication number Publication date
JP3751921B2 (en) 2006-03-08

Similar Documents

Publication Publication Date Title
EP0759349B1 (en) Automatic molding machine using release film
US10093048B2 (en) Molding system and method of manufacturing molded article
JP4849901B2 (en) Press forming equipment
DE19515192C2 (en) Process for forming a pattern on an article during its injection molding and device for this purpose
US6454557B1 (en) Thermoforming machine with linear recirculation of sheet holding frames
JP3427899B2 (en) Method and apparatus for extruding wood fiber board
KR101400811B1 (en) Intermittent film forming system and intermittent film forming method
KR100221282B1 (en) Injection molding simultaneous patterning method and apparatus
US20050056366A1 (en) Method and apparatus of pressing in manufacturing glued laminated wood
JP2788023B2 (en) Injection molding simultaneous painting equipment
JP2695348B2 (en) Injection molding simultaneous painting device
CN100483657C (en) Resin molding machine
CN1521094A (en) Tape-shaped package
US4439123A (en) Injection molding machine
JP2011014880A (en) Apparatus and method for connecting lead wire of semiconductor cell
JPH1044183A (en) Method and device for simultaneous muffle painting with injection molding
TWI606526B (en) Resin molding apparatus and resin molding method
KR101419812B1 (en) Compression molding apparatus and compression molding method of resin molded product comprising fiber
US20190099929A1 (en) Convey device, molded article manufacturing apparatus, and method of manufacturing molded article
US5297897A (en) Single-strip molding apparatus
JP2006278927A (en) Method and device for pasting tape to wafer
WO2001043942A1 (en) Resin sealing mold and resin sealing method
JP6438913B2 (en) Mold and resin molding equipment
CN1318198C (en) Press mechanism, clamp mechanism, and molding machine using this clamp mechanism
KR20090013125A (en) Polymer film splicing method and device, and stretching method

Legal Events

Date Code Title Description
A621 Written request for application examination

Effective date: 20040319

Free format text: JAPANESE INTERMEDIATE CODE: A621

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20051118

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20051206

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20051208

R150 Certificate of patent (=grant) or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20091216

Year of fee payment: 4

FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 4

Free format text: PAYMENT UNTIL: 20091216

FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 5

Free format text: PAYMENT UNTIL: 20101216

FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 6

Free format text: PAYMENT UNTIL: 20111216

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121216

Year of fee payment: 7

LAPS Cancellation because of no payment of annual fees